Antenna



FIG. 1 is a front elevational view of an antenna showing my new designfrom the front and top;

FIG. 2 is a top plan view thereof, the bottom being a mirror imagethereof;

FIG. 3 is a right end elevational view thereof, the left end being amirror image thereof; and,

FIG. 4 is a rear elevational view thereof.

The ornamental design for an antenna, as shown and described.